9-Meth­oxy-6a,11a-dimethyl-6a,11a-dihydro-6H-1-benzofuro[3,2-c]chromen-3-ol from Dalbergia oliveri

The title compound, commonly known as (+)-(6aS,11aS)-medicarpin, C16H14O4, was isolated from Dalbergia oliveri and displays a rigid mol­ecule consisting of four fused rings. The benzofuran system is inclined at an angle of 76.49 (2)° with respect to the chroman unit. The compound exists as a polymeric chain arising from inter­molecular O—H⋯O bonding

Long Chain Aliphatic Alcohols And Saturated Carboxylic Acids From Heartwood Of Rhizophora Apiculata

Five long chain aliphatic alcohols, 11 long chain aliphatic saturated carboxylic acids, three steroids, 2,6-dimethoxy-p-benzoquinone, syringaldehyde and sitosteryl 3-glucoside were isolated from the heartwood of Rhizophora apiculata and subsequently bioassayed for boll weevil antifeedant, antifungal and antimicrobial activity. While 2,6-dimethoxy-p-benzoquinone is the only constituent which exhibited activity, it is significant that this compound was active against fungi, bacteria and boll weevils. © 1993

Taraxeryl Cis-P-Hydroxycinnamate, A Novel Taraxeryl From Rhizophora Apiculata

Taraxerol, careaborin (taraxeryl trans-p-hydroxycinnamate), and the novel triterpenoid taraxeryl cis-p-hydroxycinnamate were isolated from the leaves of Rhizophora apiculata. © 1990, American Chemical Society. All rights reserved

Structure Of Trigonostemone, A New Phenanthrenone From The Thai Plant Trigonostemon Reidioides

Trigonostemone [1] has been isolated from Trigonostemon reidioides. Its structure has been established spectroscopically and confirmed by X-ray crystallography. © 1990, American Chemical Society. All rights reserved

Bioactive Norsesterterpene 1,2-Dioxanes from a Thai Sponge, <i>Mycale</i> sp

Two new norsesterterpene 1,2-dioxanes, mycaperoxides A (2) and B (3), have been isolated from a Thai sponge of the genus Mycale. Their relative structures were determined by X-ray and spectroscopic methods and their absolute configurations assigned by applying the Kusumi and Kakisawa modification of Mosher’s method. Both compounds showed significant cytotoxicity and in vitro antiviral activity

Bioactive Chromodorolide Diterpenes from an Aplysillid Sponge

Abstract: The known chromodorolides A (1) and B (2), and a new derivative chromodorolide C (3) have been isolated from an Australian sponge and characterized by 1D and 2D NMR experiments. The chromodorolides exhibited significant cytotoxicity against the P388 mouse leukaemia cell line, and also showed activity against the freeliving larval stages of the parasitic nematodes Haemonchus contortus and Trichostrongylus colubriformis